<template>
    <div class="list" ref="wrapper">
        <div>
            <div class="area">
                <div class="title border-topbottom">当前城市</div>
                <div class="button-list">
                    <div class="button-wrapper">
                        <div class="button">{{this.currentCity}}</div>
                    </div>
                </div>
            </div>
            <div class="area">
                <div class="title border-topbottom">热门城市</div>
                <div class="button-list">
                    <div class="button-wrapper" v-for="item of hot" :key="item.id" @click="handleCityClick(item.name)">
                        <div class="button">{{item.name}}</div>
                    </div>
                </div>
            </div>
            <div
                class="area"
                v-for="(item,key) of city"
                :key="key"
                :ref="key"
            >
                <div class="title border-topbottom">{{key}}</div>
                <div class="item-list">
                    <div
                        class="item border-bottom"
                        v-for="infoItem of item"
                        :key="infoItem.id"
                        @click="handleCityClick(infoItem.name)"
                    >
                        {{infoItem.name}}
                    </div>
                </div>
            </div>
        </div>
    </div>

</template>

<script>
    import Bscroll from "better-scroll"
    import { mapState, mapMutations} from 'vuex'
    export default{
        name:'CityList',
        mounted (){
            this.scroll = new Bscroll(this.$refs.wrapper)
        },
        computed:{
            ...mapState({
                currentCity:'city'
            })
        },
        watch :{
          letter () {
              if(this.letter){
                  const element = this.$refs[this.letter][0];
                  this.scroll.scrollToElement(element);
              }

            }
        },
        methods:{
            handleCityClick (city){
                this.changeCity(city);
                this.$router.push('/')
            },
            ...mapMutations(['changeCity'])
        },
        props:{
            city:Object,
            hot:Array,
            letter:String
        }
    }

</script>

<style lang="stylus" scoped>
    @import "~styles/varibles.styl"
    .border-topbottom
        &:before
            border-color:#ccc
        &:after
            border-color:#ccc
    .border-bottom
        &:before
            border-color:#ccc
    .list
        overflow:hidden
        position: absolute
        top: 1.58rem
        left: 0
        right: 0
        bottom: 0
        .title
            line-height:.54rem
            background: #eee
            padding-left:.2rem
            color:#666
            font-size:.26rem
        .button-list
            padding:.1rem .6rem .1rem .1rem
            overflow:hidden
            .button-wrapper
                float:left
                width: 33.33%
                .button
                    text-align center
                    margin:.1rem
                    padding:.1rem 0
                    border:.02rem solid #ccc
                    border-radius:.06rem
        .item-list
            .item
                line-height: .76rem
                padding-left:.2rem
</style>